Congrats!

You've graduated to the pink board! (FYI, you should do most of your pg postings over there from now on just to be sensitive to others)

In terms of preventing m/c, I think the only thing you can really do to prevent spontaneous m/c (that is a m/c not caused by a genetic abnormality) is keep your p4 level up. Your RE should test it along with your first beta, so if it's not on the script, then ask for it. Most Drs say above 10 is ok with a natural BFP, but I would ask for p4 support if it's below 20. Also, if you eliminated wheat during this cycle, you should probably keep away from it for at least the 1st trimester, to keep your antibody count low (if you have any sort of real intolerance). Otherwise, there's not much you can do to prevent m/c if it's a genetic abnormality that causes abnormal growth.